Measurement Of D0 D0bar Mixing And Cp Violation In Two Body D0 Decays
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Measurement Of D0 D0bar Mixing And Cp Violation In Two Body D0 Decays
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Author :
language : en
Publisher:
Release Date : 2013
Measurement Of D0 D0bar Mixing And Cp Violation In Two Body D0 Decays written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Measurement Of Mixing And Cp Violation In The Two Body D0 Decays To Kk Pipi And Kpi With The Babar Experiment
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Author :
language : en
Publisher:
Release Date : 2012
Measurement Of Mixing And Cp Violation In The Two Body D0 Decays To Kk Pipi And Kpi With The Babar Experiment written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
In this thesis we present the measurement of D0 - $\bar{D}$0 mixing parameter yCP using the full BABAR data sample. We also searched for CP violation in the D0 → K+K-, [pi]+[pi]- channels, finding the parameter [Delta]Y compatible with zero. In Chapter 1, we briefly review the SM and introduce the theoretical framework of neutral meson mixing and CP violation. The BABAR detector and the performance of each sub-detector are described in Chapter 2. In Chapter 3, we present an overview of the analysis including a brief description of the previous similar BABAR analyses and the expected improvements in the present analysis. The candidate reconstruction and selection are described in Chapter 4, together with the optimization of the signal region. The signal and background event classes are described in Chapter 5, where we also provide the probability density functions used to extract the mixing and CP violating parameter. In Chapter 6 we describe the various crosschecks performed to validate the analysis and the evaluation of the systematic error. Finally in Chapter 7 we present the final results and their interpretation.
Measurement Of Mixing And Cp Violation In The Two Body D0 Decays To K K Pi Pi And K Pi With The Babar Experiment
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Author : Giulia Casarosa
language : en
Publisher:
Release Date : 2012
Measurement Of Mixing And Cp Violation In The Two Body D0 Decays To K K Pi Pi And K Pi With The Babar Experiment written by Giulia Casarosa and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Searches For New Physics In Cp Violation From Babar
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Author :
language : en
Publisher:
Release Date : 2015
Searches For New Physics In Cp Violation From Babar written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
Results of recent searches for new physics in CP violation in charm decays from the BABAR experiment are presented. These results include a measurement of D0 - anti D0 mixing and searches for CP violation in two-body D0 decays, a search for CP violation in the charm decays D" 2!KS0K " and D s" 2!KS0K", KS0[pi]", and a search for direct CP violation in the singly-Cabibbo suppressed D" 2!K+K-[pi]"decays. These studies are based on the fi nal dataset collected by BABAR at the PEP-II B factory at SLAC in the period 1999-2008. No evidence of CP violation is found in these charm decays. The measured mixing parameter yCP = [0.72 " 0.18(stat) " 0.12(syst)]% excludes the no-mixing null hypothesis with a signifi cance of 3.3[sigma].
D0 D0bar Mixing
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Author :
language : en
Publisher:
Release Date : 2011
D0 D0bar Mixing written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Recently, the B factory experiments BABAR and Belle as well as the CDF collaboration found evidence for mixing in the D meson system. The current status (beginning of summer 2008) of the experimental results of D° mixing is summarized. In this paper, we present an overview of D° mixing. After an introduction to the charm mixing phenomenology and analysis techniques, results of the mixing parameters and CP violation as related to mixing are summarized. They are obtained from hadronic two-body, multi-body final states and from quantum correlated D° decays of the experiments BABAR, Belle, Cleo and CDF. Mixing results from semileptonic D° decays can be found elsewhere.
Measurement Of Cp Violation In B0d Mixing Using B0d 2 D Mu Nu Mu X Decays
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Author :
language : en
Publisher:
Release Date : 2012
Measurement Of Cp Violation In B0d Mixing Using B0d 2 D Mu Nu Mu X Decays written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
This thesis describes the measurement of the time-integrated semileptonic charge asymmetry in B0d mixing, ad sl, using the decay chain of B0d! D*-[mu]+([nu][mu]), D*-! D0[pi]-, D0! K+[pi]-. Decay candidates are reconstructed from 10.4 fb-1 of data recorded by the DØ detector at Fermilab's Tevatron p$\bar{p}$ collder during the 2002- 2011 'RunII' data taking period. Yields are extracted using a 2 minimising simultaneous binned fit where 490k D candidates are reconstructed. The measurements presented in this thesis was made possible due to sophisticated online and offline reconstruction software, precise tracking systems, and the first-order background asymmetry negating magnet polarity reversal of the DØ detector.
Measurement Of D0 Bar D 0 Mixing With A Time Dependent Amplitude Analysis Of D0 2 K Pi Pi 0
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Author :
language : en
Publisher:
Release Date : 2013
Measurement Of D0 Bar D 0 Mixing With A Time Dependent Amplitude Analysis Of D0 2 K Pi Pi 0 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Flavor mixing of neutral mesons is a long and well known phenomenon in particle physics. Experimental evidence of mixing of the neutral kaon was obtained in 1956, followed in 1987 by the evidence of Bd mixing. In 1974, A. Pais and S.B. Treiman firstly introduced the idea of charm mixing and CP violation. Even though many searches were conducted over time, it was clear that the small scale at which both amplitude and frequency of the oscillation took place made any possible observation challenging. In 2007, both the BABAR and Belle experiments announced the first evidence of mixing in the charm sector. The analyses concerned the study of a two body decay of the D0 meson. Few months later, BABAR presented the analysis of the decay D0 2!K+[pi]-[pi]0 . This is the main topic of this thesis.
Measurement Of D0 Bar D 0 Mixing With A Time Dependent Amplitude Analysis Of D0 U2192 K 0
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Author :
language : en
Publisher:
Release Date : 2013
Measurement Of D0 Bar D 0 Mixing With A Time Dependent Amplitude Analysis Of D0 U2192 K 0 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Flavor mixing of neutral mesons is a long and well known phenomenon in particle physics. Experimental evidence of mixing of the neutral kaon was obtained in 1956, followed in 1987 by the evidence of Bd mixing. In 1974, A. Pais and S. B. Treiman firstly introduced the idea of charm mixing and CP violation. Even though many searches were conducted over time, it was clear that the small scale at which both amplitude and frequency of the oscillation took place made any possible observation challenging. In 2007, both the BABAR and Belle experiments announced the first evidence of mixing in the charm sector. The analyses concerned the study of a two body decay of the D0 meson. Few months later, BABAR presented the analysis of the decay D0 → K+?-?0 . This is the main topic of this thesis.
Measurement Of Cp Violation Parameters In B Quark Decays To Charm Anticharm Down Quarks Exclusive Decays At The Babar Experiment
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Author :
language : en
Publisher:
Release Date : 2003
Measurement Of Cp Violation Parameters In B Quark Decays To Charm Anticharm Down Quarks Exclusive Decays At The Babar Experiment written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
The BABAR experiment at SLAC provides an opportunity for measurement of CP violation in B decays. A measurement of time-dependent CP violating asymmetries using exclusive B meson decays where the b quark decays to c{bar c}d (including B° 2!D*D*− and B° 2!D*{sup ±}D{sup {-+}} decays) is presented here. This is the first measurement of CP violation in a mode sensitive to the Unitarity Triangle parameter sin2[beta] outside of decays containing charmonium. It provides a comparison to measurements of sin2[beta] using b 2!c{bar c}s, and permits an observation into potential new physics sources of CP violation, such as supersymmetry, via differences between these measurements and those of B° 2!J/[psi] K{sub S}° as statistics of reconstructed neutral B decays to D{sup (*)+} D{sup (*)-} increase. The measured value of the time-dependent CP violating asymmetries are: S = 0.38 ± 0.88(stat) ± 0.12(syst) and C = -0.30 ± 0.50(stat) ± 0.13(syst) for B° 2!D*− D; S = -0.43 ± 1.41(stat) ± 0.23(syst) and C = 0.53 ± 0.74(stat) ± 0.15(syst) for B° 2!D*+ D−; and S = -0.05 ± 0.45(stat) ± 0.05(syst) and C = 0.12 ± 0.30(stat) {+-} 0.05(syst) for B° 2!D*− D+; where S corresponds to CP violation in the interference of mixing and decay and C corresponds to CP violation in decay.
Measurement Of Neutral B Neutral B Mixing And Studies Of The Feasibility Of Measuring Cp Violation In B To D Pi Decays
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Author : Yangheng Zheng
language : en
Publisher:
Release Date : 2002
Measurement Of Neutral B Neutral B Mixing And Studies Of The Feasibility Of Measuring Cp Violation In B To D Pi Decays written by Yangheng Zheng and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Mesons categories.